In this Wednesday, Oct. 23, 2103 photo, Manchester City's Yaya Toure, right, speaks to the referee Ovidiu Hategan, left, during the Champions League group D soccer match between CSKA Moscow and Manchester City, at Arena Khimki stadium outside Moscow, Russia, on Wednesday, Oct. 23, 2013. Manchester City midfielder Yaya Toure called on UEFA to take action against CSKA Moscow after he was subjected to racist chanting during his team's 2-1 win in the Champions League. The Ivory Coast player said he — AP

In this Wednesday, Oct. 23, 2103 photo, Manchester City's Yaya Toure, right, speaks to the referee Ovidiu Hategan, left, during the Champions League group D soccer match between CSKA Moscow and Manchester City, at Arena Khimki stadium outside Moscow, Russia, on Wednesday, Oct. 23, 2013. Manchester City midfielder Yaya Toure called on UEFA to take action against CSKA Moscow after he was subjected to racist chanting during his team's 2-1 win in the Champions League. The Ivory Coast player said he
/ AP

NYON, Switzerland 
UEFA President Michel Platini has ordered an investigation after a Champions League referee failed to follow guidelines and stop a match to warn Russian fans about racist abuse.

UEFA said on Friday its protocol for match officials to handle racism incidents "was not applied" during the CSKA Moscow-Manchester City match on Wednesday.

The organization asks referees to "stop the match and ask for a public address system announcement to be made" when racist chants or displays occur.

Platini's request puts 33-year-old Romanian referee Ovidiu Hategan under scrutiny as well as the Russian club. UEFA has opened a disciplinary case against CSKA, prompted by complaints by Man City and midfielder Yaya Toure, who is black.